Reading:

http://kindergarten.acsd.wikispaces.net/ - click on "Tumblebooks" to feature online books. I'm sure this teacher subscribed to this and already input her user information; therefore going through her wiki is the only way to get there without paying. This would be a fabulous literacy center! We'll see how long it lasts. It's awesome!
http://pbskids.org/
http://www.starfall.com
http://wallenpaupackkindergartenwiki.wikispaces.com/ - Click on "Reading Street" for leveled readers!

Math:

http://www.e-learningforkids.org/courses.html
http://macmillanmh.com/math/mathtoolchest/mtc_online/
http://nlvm.usu.edu/en/nav/vlibrary.html
http://hoodamath.com/games/allgames.php
http://www.ixl.com/
http://www.internet4classrooms.com/skills-k-mathbuilders.htm
http://www.uen.org/k-2interactives/index

SMART Board:

http://www.exchange.smarttech.com
http://www.superteachertools.com/
http://www.longwood.k12.ny.us/longsmart3.html